Question: Let f be a relation from Q to Z defined as follows: For any Q, write z = for some integers p, q with

Let f be a relation from Q to Z defined as follows:

Let f be a relation from Q to Z defined as follows: For any Q, write z = for some integers p, q with q +0. Let n Z. Then (z,n) if p+q=n. Prove or disprove that f is a function from Q to Z.

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